Physics, 31.07.2019 03:50 cal1805p8uo38
If your friend asked, "why are plastics good insulators? " you would reply: 1. in order for electricity to flow you must have atoms that are able to easily lose or accept an electron. plastic atoms have this characteristic, which makes them a good insulator. 2.materials like plastics do not have any loosely bound electrons in their outer shell making it difficult, if not impossible, for electrons to move between atoms. 3. plastics and rubber atoms have the same number of neutrons and electrons. this allows them to share electrons with other materials, allowing electric current to flow freely. 4. the most important quality of an insulator is that its atoms are balanced with the same number of protons and electrons. plastic atoms have this characteristic which makes them an excellent insulator.
Answers: 1
Physics, 21.06.2019 16:30
How do hydroponic plants differ from nonhydroponic plants? a.) hydroponic plants can grow in a dryer soil. nonhydroponic plants grow in moist soil. b.) hydroponic plants grow on other plants and are known as air plants. nonhydroponic plants do not grow on other plants. c.) hydroponic plants can only grow in rain forests. nonhydroponic plants cannot grow in rain forests. d.) hydroponic plants are grown without soil. nonhydroponic plants are grown in soil.
Answers: 2
Physics, 22.06.2019 11:00
Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide? kg • what must the total momentum of the system be after the train cars collide? kg •
Answers: 2
Physics, 23.06.2019 04:00
A15 ohm resistor and a 25 ohm resistor are connected in parallel to a 60 volt battery. what is the power used by each device
Answers: 1
Physics, 23.06.2019 06:30
Asquare isothermal chip is of width w=5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the front surface is exposed to the flow of a coolant at tinf=15 °c. from reliability considerations, the chip temperature must not exceed t=85 °c. if the coolant is air and the corresponding convection coefficient is h=200 w/m2 x k, what is the maximum allowable "power" of the chip? if the coolant is a liquid for which h=3000 w/m2 x k, what is the maximum allowable power of the chip?
Answers: 2
If your friend asked, "why are plastics good insulators? " you would reply: 1. in order for electr...
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